Kathy Biehl is an attorney and co-author of The Lawyer's Guide to Internet Research. She's written a must read piece on copyright myths called Bloggers Beware: Debunking Eight Copyright Myths of the Online World. If you're blogging, you should read this article so that you can have a better idea of what's acceptable and what's not:

A handful of myths have spawned practices, particularly among bloggers and Website owners, that turn copyright law on its head. These myths are rooted in the assumption that everything is up for use online unless and until proven otherwise. It doesn’t help that technology has made it so easy to take and share images, text and files. Those myths and that ease have fostered a presumption of entitlement that causes Netizens to treat the Internet (and non-electronic sources as well) as a buffet spread of photos, articles, sounds and multi-media files free for the plucking and posting.

Biehl notes the following eight myths of copyright:

• It's okay to use anything that doesn't have a copyright notice.
• It's okay to use anything that's online, because if it's online, it's in the public domain and up for grabs.
• It's okay to use anything as long as I'm not making any money off it.
• It's okay to use anything as long as I give credit.
• It's okay to use anything as long as I include the creator's copyright notice.
• It's okay to use anything as long as I take it down when the copyright holder objects.
• It's okay to use something if I can't find the copyright holder.
• It's okay to use something if I asked for permission and didn't get a response.

All bloggers should read this article!